The term meant "disciplined" or "skilled" at that time. The 2A doesn't authorize the militia, that was authorized in Article 1 Section 8, specifically "[The Co

The term meant "disciplined" or "skilled" at that time. The 2A doesn't authorize the militia, that was authorized in Article 1 Section 8, specifically "[The Congress shall have the Power] To provide for organizing, arming, and disciplining, the Militia." Note that when the Constitution gives the government power it plainly notes as much.